气候变化领域集成服务门户(CCPortal): An anisotropic bounding surface elastoplastic constitutive model for frozen sulfate saline silty clay under cyclic loading

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DOI	10.1016/j.ijplas.2020.102668
	An anisotropic bounding surface elastoplastic constitutive model for frozen sulfate saline silty clay under cyclic loading
	Zhao, Yanhu; Lai, Yuanming; Pei, Wansheng; Yu, Fan
发表日期	2020
ISSN	0749-6419
EISSN	1879-2154
卷号	129
英文摘要	To study the mechanical properties of frozen saline soil under cyclic loading, the cyclic tri-axial compressive experiments of 36 samples are performed for frozen saline silty clay with 0.0, 0.5, 1.5 and 2.5% of Na2SO4 contents at the temperature of -6 degrees C, respectively. The experimental results illustrate that the effect of the salt contents and confining pressures on the strength and deformation properties of frozen sulfate saline soils under cyclic loading is significant. To understand the deformation characteristics of frozen sulfate saline silty clay (this kind of saline soil), a bounding surface elastoplastic constitutive model is presented based on the test results and bounding surface plasticity theory. The proposed model includes the effects of salt contents and confining pressures on dynamic characteristics, therefore, it can suitably describe the dynamic stress-strain response of frozen saline soil under cyclic dynamic loading. This proposed model includes: (1) Critical stress ratio calculation formula, considering the effect of salt contents and confining pressures, is proposed. Critical stress ratio and bounding surface shape parameter varying with confining pressures are introduced into plastic potential surface function and bounding surface function to describe pressure melting and crushing characteristics of frozen soils under high confining pressures. (2) The influence of the initial anisotropy and the induced anisotropy by dynamic loads on bounding surface of rotation hardening is considered. A nonassociated flow rule together with a mixed hardening rule is used to describe the plastic flow rule and hardening rule of soils during cyclic loading, respectively. (3) A radial mapping rule with mobile mapping origin is employed to simulate elastoplastic properties of soils during cyclic loading. By comparing its simulated results with the test results of cyclic triaxial compression tests, it is found that the proposed model in this paper can well predict deformation characteristics of this kind of saline soil under cyclic loading.
英文关键词	Frozen sulfate saline silty day; Cyclic dynamic loading; Critical stress ratio; Hardening; Bounding surface elastoplastic model
语种	英语
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS关键词	ZERO-ELASTIC RANGE ; GRANULAR-MATERIALS ; PLASTICITY MODEL ; MECHANICAL-BEHAVIOR ; CONFINING PRESSURE ; STRENGTH CRITERION ; BEREA SANDSTONE ; CRITICAL-STATE ; DAMAGE MODEL ; SOILS
WOS记录号	WOS:000522638300003
来源期刊	INTERNATIONAL JOURNAL OF PLASTICITY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239573
作者单位	[Zhao, Yanhu; Lai, Yuanming; Pei, Wansheng; Yu, Fan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Zhao, Yanhu; Lai, Yuanming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yanhu,Lai, Yuanming,Pei, Wansheng,et al. An anisotropic bounding surface elastoplastic constitutive model for frozen sulfate saline silty clay under cyclic loading[J]. 中国科学院西北生态环境资源研究院,2020,129.
APA	Zhao, Yanhu,Lai, Yuanming,Pei, Wansheng,&Yu, Fan.(2020).An anisotropic bounding surface elastoplastic constitutive model for frozen sulfate saline silty clay under cyclic loading.INTERNATIONAL JOURNAL OF PLASTICITY,129.
MLA	Zhao, Yanhu,et al."An anisotropic bounding surface elastoplastic constitutive model for frozen sulfate saline silty clay under cyclic loading".INTERNATIONAL JOURNAL OF PLASTICITY 129(2020).